initial handshake

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

.gitignore

@@ -0,0 +1,3 @@
+*~
+handshake
+vendor/

Makefile

@@ -0,0 +1,17 @@
+PACKAGES=$(shell go list ./... | grep -v /vendor/)
+REVISION=$(shell git rev-parse HEAD)
+DEBUG=0
+
+ifeq ($(DEBUG),1)
+	D = 
+else
+	D = @
+endif
+
+all: build
+
+protos:
+	$(D)protobuild --quiet ${PACKAGES}
+
+build:
+	$(D)CGO_ENABLED=0 go build -v -ldflags '-extldflags "-static"' .

Protobuild.toml

@@ -0,0 +1,46 @@
+version = "unstable"
+
+generator = "gogo"
+
+# Plugins allows one to specify one or more plugins for use in generation.
+#
+# The common example grpc is provided below.
+plugins = ["grpc"]
+
+# Control protoc include paths. Below are usually some good defaults, but feel
+# free to try it without them if it works for your project.
+[includes]
+  # Include paths that will be added before all others. Typically, you want to
+  # treat the root of the project as an include, but this may not be necessary.
+  #
+  # "." is included by default
+  before = ["."]
+
+  # Paths that should be treated as include roots in relation to the vendor
+  # directory. These will be calculated with the vendor directory nearest the
+  # target package.
+  #
+  # With the example below, we import the gogo protobufs from the vendor
+  # directory.
+  #
+  # This is empty by default.
+  vendored = ["github.com/gogo/protobuf", "github.com/gogo/googleapis"]
+
+  # Paths that will be added untouched to the end of the includes. We use
+  # `/usr/local/include` to pickup the common install location of protobuf.
+  # This is the default.
+  # after = ["usr/local/include"]
+
+# This section let's us map protobuf imports to Go packages. These will become
+# `-M` directives in the call to the go protobuf generator.
+#
+# We have a few examples to map packages from the examples.
+[packages]
+  "gogoproto/gogo.proto"             = "github.com/gogo/protobuf/gogoproto"
+  "google/api/annotations.proto"     = "github.com/gogo/googleapis"
+  "google/api/http.proto"            = "github.com/gogo/googleapis"
+  "google/protobuf/descriptor.proto" = "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
+  "google/protobuf/timestamp.proto"  = "github.com/gogo/protobuf/types"
+  "google/protobuf/duration.proto"   = "github.com/gogo/protobuf/types"
+  "google/protobuf/any.proto"        = "github.com/gogo/protobuf/types"
+  "google/protobuf/empty.proto"      = "github.com/gogo/protobuf/types"

api/v1/doc.go

@@ -0,0 +1 @@
+package v1

api/v1/handshake.pb.go

@@ -0,0 +1,250 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: git.thisco.de/vbatts/handshake/api/v1/handshake.proto
+
+package v1
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/gogo/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+type Request struct {
+	ID                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Msg                  string   `protobuf:"bytes,2,opt,name=msg,proto3" json:"msg,omitempty"`
+	Pubkey               string   `protobuf:"bytes,3,opt,name=pubkey,proto3" json:"pubkey,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Request) Reset()         { *m = Request{} }
+func (m *Request) String() string { return proto.CompactTextString(m) }
+func (*Request) ProtoMessage()    {}
+func (*Request) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7562d4bb73541a2a, []int{0}
+}
+func (m *Request) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request.Unmarshal(m, b)
+}
+func (m *Request) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request.Marshal(b, m, deterministic)
+}
+func (m *Request) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request.Merge(m, src)
+}
+func (m *Request) XXX_Size() int {
+	return xxx_messageInfo_Request.Size(m)
+}
+func (m *Request) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request proto.InternalMessageInfo
+
+func (m *Request) GetID() string {
+	if m != nil {
+		return m.ID
+	}
+	return ""
+}
+
+func (m *Request) GetMsg() string {
+	if m != nil {
+		return m.Msg
+	}
+	return ""
+}
+
+func (m *Request) GetPubkey() string {
+	if m != nil {
+		return m.Pubkey
+	}
+	return ""
+}
+
+type Response struct {
+	ID                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Msg                  string   `protobuf:"bytes,2,opt,name=msg,proto3" json:"msg,omitempty"`
+	Pubkey               string   `protobuf:"bytes,3,opt,name=pubkey,proto3" json:"pubkey,omitempty"`
+	Challenge            string   `protobuf:"bytes,4,opt,name=challenge,proto3" json:"challenge,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Response) Reset()         { *m = Response{} }
+func (m *Response) String() string { return proto.CompactTextString(m) }
+func (*Response) ProtoMessage()    {}
+func (*Response) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7562d4bb73541a2a, []int{1}
+}
+func (m *Response) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Response.Unmarshal(m, b)
+}
+func (m *Response) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Response.Marshal(b, m, deterministic)
+}
+func (m *Response) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Response.Merge(m, src)
+}
+func (m *Response) XXX_Size() int {
+	return xxx_messageInfo_Response.Size(m)
+}
+func (m *Response) XXX_DiscardUnknown() {
+	xxx_messageInfo_Response.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Response proto.InternalMessageInfo
+
+func (m *Response) GetID() string {
+	if m != nil {
+		return m.ID
+	}
+	return ""
+}
+
+func (m *Response) GetMsg() string {
+	if m != nil {
+		return m.Msg
+	}
+	return ""
+}
+
+func (m *Response) GetPubkey() string {
+	if m != nil {
+		return m.Pubkey
+	}
+	return ""
+}
+
+func (m *Response) GetChallenge() string {
+	if m != nil {
+		return m.Challenge
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*Request)(nil), "de.thisco.vbatts.handshake.v1.Request")
+	proto.RegisterType((*Response)(nil), "de.thisco.vbatts.handshake.v1.Response")
+}
+
+func init() {
+	proto.RegisterFile("git.thisco.de/vbatts/handshake/api/v1/handshake.proto", fileDescriptor_7562d4bb73541a2a)
+}
+
+var fileDescriptor_7562d4bb73541a2a = []byte{
+	// 243 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x32, 0x4d, 0xcf, 0x2c, 0xd1,
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+	0x58, 0x10, 0x4d, 0x4a, 0xde, 0x5c, 0xec, 0x41, 0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x62,
+	0x5c, 0x4c, 0x99, 0x29, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x4e, 0x6c, 0x8f, 0xee, 0xc9, 0x33,
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+	0x2c, 0x60, 0x29, 0x84, 0x80, 0x51, 0x2a, 0x17, 0xa7, 0x07, 0xcc, 0x7b, 0x42, 0x11, 0x5c, 0xac,
+	0x1e, 0xa9, 0x39, 0x39, 0xf9, 0x42, 0x6a, 0x7a, 0x78, 0x03, 0x41, 0x0f, 0xea, 0x57, 0x29, 0x75,
+	0x82, 0xea, 0x20, 0xde, 0x70, 0xd2, 0x8a, 0xd2, 0x20, 0x2a, 0x36, 0xac, 0xcb, 0x0c, 0x23, 0x18,
+	0x92, 0xd8, 0xc0, 0x81, 0x6a, 0x0c, 0x08, 0x00, 0x00, 0xff, 0xff, 0xae, 0xe7, 0x8c, 0x19, 0xc2,
+	0x01, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// HandshakeClient is the client API for Handshake service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type HandshakeClient interface {
+	Hello(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error)
+}
+
+type handshakeClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewHandshakeClient(cc *grpc.ClientConn) HandshakeClient {
+	return &handshakeClient{cc}
+}
+
+func (c *handshakeClient) Hello(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
+	out := new(Response)
+	err := c.cc.Invoke(ctx, "/de.thisco.vbatts.handshake.v1.Handshake/Hello", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// HandshakeServer is the server API for Handshake service.
+type HandshakeServer interface {
+	Hello(context.Context, *Request) (*Response, error)
+}
+
+// UnimplementedHandshakeServer can be embedded to have forward compatible implementations.
+type UnimplementedHandshakeServer struct {
+}
+
+func (*UnimplementedHandshakeServer) Hello(ctx context.Context, req *Request) (*Response, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Hello not implemented")
+}
+
+func RegisterHandshakeServer(s *grpc.Server, srv HandshakeServer) {
+	s.RegisterService(&_Handshake_serviceDesc, srv)
+}
+
+func _Handshake_Hello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Request)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(HandshakeServer).Hello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/de.thisco.vbatts.handshake.v1.Handshake/Hello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(HandshakeServer).Hello(ctx, req.(*Request))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Handshake_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "de.thisco.vbatts.handshake.v1.Handshake",
+	HandlerType: (*HandshakeServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Hello",
+			Handler:    _Handshake_Hello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "git.thisco.de/vbatts/handshake/api/v1/handshake.proto",
+}

api/v1/handshake.proto

@@ -0,0 +1,25 @@
+syntax = "proto3";
+
+package de.thisco.vbatts.handshake.v1;
+
+import weak "gogoproto/gogo.proto";
+//import "google/protobuf/empty.proto";
+
+option go_package = "git.thisco.de/vbatts/handshake/api/v1;v1";
+
+service Handshake {
+	rpc Hello(Request) returns (Response);
+}
+
+message Request {
+	string id = 1 [(gogoproto.customname) = "ID"];
+	string msg = 2;
+	string pubkey = 3;
+}
+
+message Response {
+	string id = 1 [(gogoproto.customname) = "ID"];
+	string msg = 2;
+	string pubkey = 3;
+	string challenge = 4;
+}

go.mod

@@ -0,0 +1,12 @@
+module git.thisco.de/vbatts/handshake
+
+go 1.15
+
+require (
+	github.com/gogo/googleapis v1.4.0
+	github.com/gogo/protobuf v1.3.1
+	github.com/pkg/errors v0.9.1
+	github.com/sirupsen/logrus v1.7.0
+	github.com/urfave/cli v1.22.4
+	google.golang.org/grpc v1.33.0
+)

go.sum

@@ -0,0 +1,80 @@
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main.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+
+	v1 "git.thisco.de/vbatts/handshake/api/v1"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+	"google.golang.org/grpc"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "handshake"
+	app.Flags = []cli.Flag{
+		cli.StringFlag{
+			Name:  "address,a",
+			Usage: "server address",
+			Value: "0.0.0.0:1111",
+		},
+	}
+	app.Commands = []cli.Command{
+		serverCommand,
+		clientCommand,
+	}
+	app.Before = func(clix *cli.Context) error {
+		if clix.GlobalBool("debug") {
+			logrus.SetLevel(logrus.DebugLevel)
+		}
+		return nil
+	}
+	if err := app.Run(os.Args); err != nil {
+		logrus.Fatal(err)
+	}
+}
+
+var serverCommand = cli.Command{
+	Name: "server",
+	Action: func(clix *cli.Context) error {
+		var (
+			address = clix.GlobalString("address")
+		)
+
+		gs := grpc.NewServer()
+		logrus.Debug("setting up gRPC service")
+		v1.RegisterHandshakeServer(gs, &HandshakeServer{})
+
+		signals := make(chan os.Signal, 32)
+		signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT)
+		go func() {
+			<-signals
+			gs.Stop()
+		}()
+		l, err := net.Listen("tcp", address)
+		if err != nil {
+			return errors.Wrap(err, "listen tcp")
+		}
+		defer l.Close()
+
+		logrus.Infof("listening on %q", address)
+		return gs.Serve(l)
+	},
+}
+
+var clientCommand = cli.Command{
+	Name: "client",
+	Action: func(clix *cli.Context) error {
+		var (
+			address = clix.GlobalString("address")
+		)
+		conn, err := grpc.Dial(address, grpc.WithInsecure())
+		if err != nil {
+			return errors.Wrap(err, "dialing server")
+		}
+		defer conn.Close()
+
+		ctx, cancel := context.WithCancel(context.Background())
+		signals := make(chan os.Signal)
+		signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT)
+		go func() {
+			<-signals
+			cancel()
+		}()
+		client := v1.NewHandshakeClient(conn)
+		req := v1.Request{
+			Pubkey: "facecafe",
+			Msg:    "hello",
+		}
+		resp, err := client.Hello(ctx, &req)
+		if err != nil {
+			return errors.Wrap(err, "client hello")
+		}
+		logrus.Infof("pubkey: %q; challenge: %q", resp.Pubkey, resp.Msg)
+
+		return nil
+	},
+}
+
+type HandshakeServer struct {
+}
+
+func (hs *HandshakeServer) Hello(ctx context.Context, req *v1.Request) (*v1.Response, error) {
+	logrus.Infof("pubkey: %q", req.Pubkey)
+	resp := v1.Response{
+		Pubkey: "deadbeef",
+		Msg:    fmt.Sprintf("did you say %q?", req.Msg),
+	}
+
+	//return nil, errors.New("not implemented")
+	return &resp, nil
+}

proto.go

@@ -0,0 +1,13 @@
+package main
+
+// go modules are not currently detecting dependencies that are defined in
+// .proto files, this is a workaround to allow them to be defined and vendored
+
+import (
+	// google/api is imported for generating protos
+	_ "github.com/gogo/googleapis/google/api"
+	// protobuf/gogoproto is imported for generating protos
+	_ "github.com/gogo/protobuf/gogoproto"
+	// protobuf/proto is imported for generating protos
+	_ "github.com/gogo/protobuf/proto"
+)